平面扩压叶栅最佳弯叶片生成线与叶栅折转角的关系

Relationship between optimum curved blade generate line and blade camber angle in linear compressor cascade

用优化的方法研究了扩压叶栅最佳弯叶片生成线与叶栅折转角之间的关系,在8个不同叶栅折转角下优化弯叶片生成线的弯角和弯高.积叠线是由两段贝塞尔曲线和一段直线组成,在这种积叠线形式下,相同弯角下弯叶片损失随弯高增大不断减小,弯叶片的最佳弯高为0.5.在相同的叶栅折转角下弯叶片损失随弯角增大先减小后增大,存在最佳弯角使弯叶片总损失最小.随着叶栅折转角增大,弯叶片收益增大.最佳弯角随着叶栅折转角的增加有增大的趋势.在给定计算条件下,最佳弯角与叶栅折转角之间呈类似线性变化规律.

The relationship between the optimum curved blade generate line and blade camber angle in linear compressor cascade was researched by optimization method.Curved angle and curved height of curved blade generate line were optimized at eight different blade camber angles.The stack line was composed of two Bezier curves and a straight line,cascade loss decreases with the increasing curved height at the same curved angle,and the optimum curved height of the curved blade is 0.5.As for an optimum curved angle,at which curved blade total loss is minimal,curved blade loss decreases with increasing curved angle when curved angle is less than curved angle,and loss grows with increasing optimum curved angle when curved angle is larger than optimum curved angle.The benefits of the curved blade improve with increasing blade camber angle.Optimum curved angle increases along with the increasing blade camber angle.The relationship of optimum curved angle and blade camber angle presents a similar linear type.